Improvement in dovetailing-machine



@anni @time JAMES Il. VANEPIS, OF ALBANY, NEW YORK.

Letters PatentiNo. 102,069, dated April 19, 1870.

IMPROVEMNT IN DOVETAILING-MACHINE.

Q The Schedule referred to in these Letters Patent and making part of the same.

To all 'whom it may concern Beit known that I, JAMES R. VAX Errs, of Albany, in the county of Albany and State of New York, have invented a new and useful Improvement in Dovetailin, tl51achines;l and I do hereby declare that the followiugis a full, clear, and exact description thereof, which will enable others skilled in the art to make and usethe same, reference being had to the accompanying drawingsforming part of this specification.

This invention relates to vnew and useful improvements in machines Vfor cutting dovetails for putting together boxes, drawers,iiasks for foundries, and for a'll similar work, and consists iu the construction, arrangement, and combination of parts, as hereinafter' more fully described.

In the accompanying plate of drawings- Figure l represents a sectional top view o t the machine, showing the cutting-cones and cylinders, and the beds for the lumber or pieces to be cut, the section being 011 the line x :tot fig. 2.

Figure 2 is a front elevation of the machine, showing the method of operating the cutter.

Figure 3 is a sectional view of one ofthe conc-cutter shafts, the section being through the line y y of ii". 4.

'oFigure 4 is a section of fig. 3 on the line z Thev two views show the method of adjusting the conc-cutter shafts laterally on the frame. v

Figure 5 represents the method of placing and fastening the cutters in the cylinders, it being a side view of the cylinder.-

Similar letters of reference indicate corresponding parts.

A represent-s the cone-cutters, which cut the mcrtise-part of the dovetail.

B represents the cyliluler-cutters, which cut the tenon-part of the dovetail. The former is cut on the endof the piece, while the piece rests on a fixed or stationary bediu a horizontal position. The latter is cut whileithe piece of lumber is on an adjustable bed. Each set of cutters-is conned in a carriage, which works vertically on the end of the machine-trame, and cut as they descend in each case.

C is the carriage for the cone-cutters A.

D is the carriage of the cylinder-cutters B.

E represents the frame of the machine. Ihe two carriages are confined in ways in the front of the frame.

F represents foot-levers, whose fnlcra are, at their inner ends, on the central post G of the frame. l

These levers are attached tothe lower ends of the carriages by means of the rods H.

I represents semicircular bands attached to the top ends of the carriages, which are connected with the springs J by the rods'K. 'When the cutters have been depressed by pressure on the levers F, they areY O- represents spring guides on the bar for governing the .depth ofthe dovetail. j

Ihe cutters are revolved by means of thc belts p on the drum q. I

The cutter-shafts r are adjustable on the carriage C, as the rails upon which their boxes S rest are slot-ted longtiulinally, and the boxes are fastened in any desired position by means of screws on the under side ofthe rails. This arrangement is seen in the detail views, figs. 3 and 4.

l represents the piece of lumber on which the cylinder-cutters B have worked.

U is the bed upon which it is fastened. This bed is semicircularin form at `its ends, so that it may be turned, and its face inclined in either direction, as seen in iig. 2. In this manner the piece I is tipped until the vertically-desccndng cylimler-cutter 'will cut the edges of the tenons on a bevel to titthe dovetail in L.

The cylimler-cutters may bc made adjustable on their shaft Y by means ot' a set-screw, as seen in a v L'Ihcse cutters are driven by means of the belt IV from the pulley X.

The bed U is adjusted or turned by means' ot'- the perpetual screw Y on the shaft` Z, which screw e11- gages with a circular rack on the inside of the head or end of the hed. j

Motion is conveyed from the drum q to the pulley X by means of the belt c. -b is a tightening-pulley bearing on this belt.

It will .be seen that, by thismachine, the usually tedious and ditlicult operation of dovetailing two pieces of lumber together, and thus making a perfectlytight and strong joint, is rendered perfectly easy, and may be performed in the most expeditious and perfect manner. v

Having 'thus described my invention,

`I claim as new anddesre to secure by Letters Iatentv 1. The rotating dovetail-cuttcrs A A, A, having a lateral adjustment and' vertical movement, as set forth, supporting-table provided with clamp Wedge m, adjustable guide-bar n, and the .s'pring guides 0 to govern depth of dovetail, all constructed andfarranged with respect to each other in the manner described.

2. The shafts 'r and their several pulleys, the belts p p p and drum q, all located on a vertically-reciproeating carriage, C, the belt a', tightening-pulley b,

:md drivingpu11ey X,a1l operating in the manner and for thel purpose bere-in shown and described.

3. The arrangement, upon the frame E, of the carriage C D, bands I I, springs J J, treadles F, and

beds for the timber, as specified, s0 that the mortise and tenou may be respectively cut in the manner set fort-h.

4. The cutters B B, each arranged on the vertiarranged, constructed, and

cally-moving frame D, in combination 'with the tipping-bed u, all as shown :md described. The above specification of my invention signed by me this 29th day of March, 1869.

JAMES R. VAN EPPS.

Witnesses:

FRANK BLocKLEY, ALEX. F. ROBERTS. 

